<em>All stars start in a large cloud of dust and gas called a nebula. Gravity can pull some of the gas and dust in a nebula together, forming a proto-star. A star is born when the gas and dust from a nebula become so hot and dense that hydrogen atoms are smashed together to form helium.</em>
<u>hope this helps</u><u>.</u><u>.</u><u>.</u><u> </u>
